Correlation of Subjective and Objective Measures of On-Center Handling

Jang, Bongchoon; Yi, Kyongsu; Jung, Chanhee; Lee, Jae-Man; Joon, Young; Park, Jae Yong; Park, Joonhong

doi:10.4271/2014-01-0128

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…To evaluate the performance of the proposed algorithm, objective parameters were introduced. In the weave test, the objective parameters, such as on-center stiffness, steering friction, and angle hysteresis, were as proposed by Jang et al 14 Here, the on-center stiffness is the gradient at zero angle, the steering friction is abscissa deadband, and the angle hysteresis is ordinate deadband. In the transition test, off-center stiffness and average steering friction are key factors.…”

Section: Hardware-in-the-loop Test Resultsmentioning

confidence: 99%

Haptic control of steer-by-wire systems for tracking of target steering feedback torque

Lee

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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This study proposes a haptic control of steer-by-wire systems for tracking a target steering feedback torque to achieve the conventional steering feedback torque. The haptic feedback control with a steer-by-wire steering-wheel system model was used to provide drivers with a conventional steering feedback torque. The steer-by-wire steering-wheel system model was developed, and a haptic control algorithm was designed for a desired steering feedback torque with a three-dimensional target steering torque map. In order to track the target steering torque to let the drivers feel the conventional steering efforts, an adaptive sliding-mode control was used to ensure robustness against parameter uncertainty. The angular velocity and angular acceleration used in the control algorithm were estimated using an infinite impulse response filter. The performance of the proposed controller was evaluated by computer simulation and hardware-in-the-loop simulation tests under various steering conditions. The proposed haptic controller successfully tracked the steering feedback torque for steer-by-wire systems.

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Section: Hardware-in-the-loop Test Resultsmentioning

confidence: 99%

Haptic control of steer-by-wire systems for tracking of target steering feedback torque

Lee

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…r door = 0:781m, H door = 1:261m, A extractors = 0:004m 2 , A leakage = 0:0063m 2 , u = 45 8 The initial swept air volume, air mass, and the total air exit area are defined as: 36 Automotive sound 40 listeners used Hara et al 37 Door closing sound company employees Lee et al 27 Automotive sound quality 33 luxury automotive club member Chen and Wang 38 Automotive interior sound quality 30 (students/professors/ drivers) Lee 39 Automotive odor evaluation 20-30 interested people Flannagan et al 40 Led headlamps 25 active drivers Tsutsumi et al 41 Cabin comfort and fatigue 15 college aged members Dang et al 32 On-center steering force 15 research staffs Zhai and Conggan 42 Sound quality 24 evaluators Baker et al 43 Sound quality 12 untrained jurors (customers) Isa et al (2014) 44 Vehicle Drivability 4 Expert drivers Hamdi et al ( 2007) 45 Brake rattle noise 3 Expert evaluators Rajesh et al 46 Brake performance 5 Expert drivers Jang et al 47 On-center handling 1 Professional test driver Chandrasekaran et al 48 Drivability 5 Expert drivers Crolla et al 49 Vehicle handling 8 Expert drivers Eduardo 50 Vehicle steering 3 Expert drivers Nybacka et al 33 Vehicle Steering 7-10 Expert drivers Liu et al 51 Vehicle Considering the above calculated initial values and using time interval of Dt = 0:0001 s, the equations ( 6) and ( 7) are solved iteratively until door opening angle is 0 8 and swept air volume V air = 0. The total air binding energy is calculated as E air binde = 8, 61Joule.…”

Section: Air Binding Effect Based On the Below Inputsmentioning

confidence: 99%

Rear boot swing door closing effort: Calculations, objective and subjective evaluations in an LCV model

Altinisik

Bolova

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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The prediction model for the energy contributors is studied to define the effect of door components. The model is validated by experimental measurements on produced vehicles. The correlation of the control results and the evaluation methods among the representative customers, appraisers and senior experts are performed and compared by objective energy measurements. The subjective evaluation aims to clarify real customer expectations in door closing process and carry it to new product development phase. This will also improve the competency of appraisers in final assembly approval zones. The energy contributors for boot swing door is numerically calculated and validated by experimental measurements in easy and hard-closing doors. Subjective evaluations in 45 vehicles with different closing energies were performed by three different groups as representative customers, appraisers, and senior experts. The results were evaluated by statistical tools. The major energy contributors were found as air binding, seal resistance and check strap both in the calculations and in the experiments. The results demonstrated good correlation between numerical model and objective measurements. Besides, the subjective evaluations showed parallel trends with objective energy measurements. The variation in customer evaluations is more than appraisers and experts. Customers are severer in the evaluations of hard-closing doors and more sensitive in 10° door closing angle. This is a unique study for rear boot swing door closing effort in an LCV model. The study contains both definitions of factors, components that contributes in door closing energy and subjective evaluations to correlate the closing behaviors of representative customers, appraisers, and senior experts. The output of the study would be used to improve the vehicle control plan (VCP) and design standards in new model development phase.

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“…一般的な感性性能は，顧客の要求特性を調査し，それに合致した特性を造り出すことで行われている．しかし，操舵感においては，一般ドライバが操舵感を評価することが困難な場合が多い．特性の異なる車両を数台用意し，試乗を行って調査することも実際上難しい．また一般ドライバは経験不足で操舵感を評価できない場合が多く，たとえ良し悪しが評価できても，細かな特性の違いを評価し，言葉に置き換えることが出来ない．従ってテストドライバによる主観的な評価によって行われることが一般的である．しかし，主観評価の定量化だけでは物理的な特性との対応が取れない．そこで，操舵角のサイン入力でのリサジュー波形から数値を読み取り，代用特性として主観評価との相関を検討することも行われている (Jang et al, 2014), , (Farrer，1993), Fig.4 (a). As a result, driver's steering operations are changed as shown in Fig.4 (c).…”

Section: ．操舵感の定量化の考え方unclassified

Proposal for objective evaluation criteria for steering feel by steering torque sinusoidal input

Kushiro

Suzuki

2017

Transactions of the JSME (In Japanese)

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The steering feel is an important technical problem for handling and drivability of driver-vehicle system and various kinds of studies have been conducted．The objective evaluation is a key factor to construct model base design process for the steering feel．Many kinds of objective evaluation criteria for the steering feel have been proposed using steering-angle input． However，these objective evaluation criteria for the steering feel should be based on driver's steering operation．The steering responses using steering torque sinusoidal input are similar to the minimum-jerk model of human operation．This study proposes objective evaluation criteria for the steering feel using steering responses by steering-torque sinusoidal input test． From the characteristics of steering torque and steering angle，and the characteristics of steering torque and yaw velocity，the objective evaluation criteria for the steering feel are proposed．For example，the increasing characteristics and the decreasing characteristics for steering torque, hysteresis and linearity of steering angle and yaw-velocity response are evaluation criteria． The objective evaluation criteria by steering torque input shows another aspect of steering characteristics because of changing steering angle response under the influence of vehicle dynamics and steering system dynamics.

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Correlation of Subjective and Objective Measures of On-Center Handling

Cited by 8 publications

References 7 publications

Haptic control of steer-by-wire systems for tracking of target steering feedback torque

Haptic control of steer-by-wire systems for tracking of target steering feedback torque

Rear boot swing door closing effort: Calculations, objective and subjective evaluations in an LCV model

Proposal for objective evaluation criteria for steering feel by steering torque sinusoidal input

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